Rotary combustion engine

ABSTRACT

A rotary combustion engine employing a unique system of combustion wherein in one revolution there occurs two intake mixture steps, two compression steps, four combustion steps, four powerstrokes and four exhaust steps. The engine comprises a housing, a cylindrical rotor disposed in the housing, a cylindrical shaft mounted in the housing for supporting the rotor therein, and a rotatable wheel coupled to the rotor having one half thereof displaced and non-planar with respect to the other half for laterally reciprocating the rotor in the housing during rotation of the rotor. Two pairs of combustion chambers are disposed in the rotor, each disposed opposite the other pair. The combustion chambers have a curved shape so that they open at one end at the periphery of the rotor and at the other end at the sides thereof.

United States Patent 1 Hariman 1 Aug. 7, 1973 ROTARY COMBUSTION ENGINE [75] Inventor: David SfHarim arif Djaltarta,

Indonesia [73] Assignee: The Raymqnd l ee Q -ganigation,

' Inc., New York, N.Y., part interest 22 Filed: Feb. 23, 1971 21 App1.No.: 117,961

Striegl 418/68 Primary Examiner-C. J. Husar Attorney-Allison C. Collard [57] ABSTRACT A rotary combustion engine employing a unique system of combustion wherein in one revolution there occurs two intake mixture steps, two compression steps, four combustion steps, four powerstrokes and four exhaust steps. The engine comprises a housing, a cylindrical rotor disposed in the housing, a cylindrical shaft mounted in the housing for supporting the rotor therein, and a rotatable wheel coupled to the rotor having one half thereof displaced and non-planar with respect to the other half for laterally reciprocating the rotor in the housing during rotation of the rotor. Two pairs of combustion chambers are disposed in the rotor, each disposed opposite the other pair. The combustion chambers have a curved shape so that they open at one end at the periphery of the rotor and at the other end at the aides thereof.

4 Claims, 4 Drawing Figures PATENIEL my; new

SHEET 1 [1F 2 FIG. 2

ROTARY COMBUSTION ENGINE SUMMARY OF THE INVENTION In my invention, I employ a piston cooperating with four combustion chambers. Each chamber has a separate exhaust port and an intake port and accommodates two spark plugs. One plug is used for low speed revolution, the other for high speedrevolution, and

both plugs fire at the same moment. Two chambers lie on one side of the piston and the other two chambers lie on the opposite side of the piston. The piston is cylindrical. The two chambers at each side lie opposite each other along a straight line which passes through the center of the cylinder.

During one revolution, combustion, power strokes and exhaust steps take place in all four combustion chambers whereby an engine having four power strokes per revolution is produced.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a view taken along line 1-1 in FIG. 2;

FIG. 2 is a side view in cross section of my invention;

FIG. 3 is a view illustrating the active and non-active conditions of the various ports in the various chambers through one half a revolution with the piston pressed against the right wall of the housing; and

FIG. 4 is a view similar to FIG. 3 but illustrating conditions during the other half cycle with the piston pressed against the left wall of the housing.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Referring now to FIGS. 1-4, a cylindrical piston is disposed in a housing 12 with left wall 16 and right wall 14 disposed on opposite ends of the cylinder. Two combustion chambers l and 2 are disposed at the left wall on opposite sides of the axis of the piston. Two other chambers 3 and 4 are disposed at the right wall on opposite sides of the axis of the piston.

The piston is disposed in piston rings 18. There is an oil seal 20, a compression seal 22, an inner shaft 24 with splines 26 and an outer oscillating shaft 28. A compression regulator 30 is disposed in compression regulator holder 32. The engine is water cooled, with water passing through various passageways as shown. Each combustion chamber has its own intake port, exhaust port and two spark plug sockets36. A separate plug 34 is disposed in each socket.

The compression in the combustion chambers is obtained by the oscillating movement of the piston which is arranged by the compression-regulator, at proper moments. The sucked-in mixture which is already in the pre-compression-chamber is compressed against the wall of the piston house but escapes through a hole or tunnel located almost at the edge of the piston into the combustion chamber. This tunnel is constructed oblique backward and opposite to the direction of piston travel. This is of benefit as additional power, in the rotation, because of the combustion in the combustion chamber, the piston is jetted away around its axis.

Each chamber is ignited by two sparkplugs. One sparkplug is for low and the other is for high speed revolution, but both fire at the same moment.

In comparison with other rotary combustion engine, for example the Wankel engine which is now being used by Toyo Kogyo for their Sport Car Cosmo has three power strokes per revolution and the ignition occurs three times simultaneously. This engine, however, has four power strokes per revolution and the ignition occurs two times each two combustions simultaneously too, with the obvious conclusion that the latter engine develops more power per revolution.

This housing is cylindrical at the inner side. It has two walls: right and left. They are separately manufactured and can be assembled by bolts, to form this house. In the drawing is drawn a water cooling system. This can be also built with air cooling, when this engine will be applied to motor cycles, etc. This house is also centric and simple in construction.

Compression rings are in the middle of the piston. Two are shown in the illustration but more may be added to secure better and proper compression.

' The piston rings are much simpler than any other Rotary Combustion Engine: they are round as other compression rings in the conventional combustion engines.

Each combustion chamber is carved within the piston at the edge, as said before there are four combustionchambers: two lie at the left side and the other two lie at the right side. They are located opposite to each other through the center of" the piston. They have a contact tunnel between the chamber and the Precompression chamber, to let the mixture through, when compressed by the oscillating piston.

The Pre-compression chamber is to be found within the Piston house between wall and piston. If the piston is moving toward the left wall the Pre-compression chamber is on the right side; if contrary, the Precompression chamber is on the left side.. So the same space is used simultaneously to obtain equal compression.

The Outersliaft, with square splines in the inner side and is built as one body with the piston. This outershaft oscillates through the inner shaft.

This engine has favorable equal balance powerstroke. The two chambers at each side lie opposite each other in a straight line through the center of the piston. When combustion takes place these two chambers develop equal power strokes at the edge of the piston. Because of this equal swing" the outer/inner shaft undergoes balanced power rotation. More power definitively can be developed by making the piston larger in diameter, thus obtaining a greater moment toward the shaft and consequently the powerstrokes become greater too, with the same combustion volume.

The oilseal Compression seal is used to insure compression; this oilseal is built in the metal bearing, and is available everywhere and is usually applied to bearings in the steam engines: asbestos, lead and carbon composition. Beside this seal is also placed another compression seal, and this must have a special construction and made of heavy duty artificial rubber rings that can withstand heat up to a certain degree. In the illustration is drawn a compression seal, but for this purpose it can be of another type.

Compression regulator 30 consists of a steel wheel 37, affixed to a hardened steel plate 38 which has elongated radially outwardly extending perforations, both bent as illustrated in FIG. 2. This is necessary to obtain the flexibility by the compression. Compression regulator 30 controls the lateral reciprocating movement of the piston during operation of the engine.

Bevel gears 39, for controlling a circuit breaker, are disposed on the inner shaft adjacent the compression regulator. These bevel gears are disposed at right angles with respect to each other. One bevel gear 40 is mounted on the inner shaft, and the second bevel gear 41 engages gear 40 and is coupled to a vertical shaft 42 which is connected to the circuit breaker housing located outside the engine.

Pulley, hood, cover and engine mounting do not need further explanation.

The operation of the engine of the invention is as follows: Piston I is initially rotated from a stationary position by a suitable starter motor. As the piston reciprocates laterally in the housing, a charge of a fuel mixture is drawn inwardly from an intake manifold into the housing on each side of piston 10. When the piston reaches the limits of its lateral movement, it is reciprocated back in the other direction and compresses the fuel-air mixture drawn into the housing. Simultaneously, fuel is drawn inwardly adjacent the other side of the piston, and the gas mixture compressed is forced into the combustion chambers which open into theinterior of the housing on each side of the piston. Thus, as the piston moves towards the walls 14 and 16 of the housing, the fuel-air mixture compressed is forced inwardly through ports 43, which open at the piston sides into combustion chambers i and 2, or 3 and 4, depending on the direction of reciprocation of the piston. W-hen piston reaches the limits of. its lateral movement, the fuel mixture is fully compressed in the combustion chambers, and is ignited by spark plugs 34 which are aligned with combustion ports 44 in piston 10. Each of the spark plugs is aligned with a corre-' sponding combustion port 44 on the corresponding side of the piston when the fuel mixture is fully compressed and the piston reaches the limit of its lateral movement in one direction. The combustion ports on the other side of the piston are thus offset from the spark plugs when the piston is in this position, since this half of the engine undergoes fuel mixture intake. When the fuel mixture is fully compressed, it is ignited in the combustion chambers, and expansion forcesare exerted on the piston in each combustion chamber and on the inner surfaces of the housing which are exposed at ports 43 and 44 at the periphery 'of the piston and walls 14 and 16. As the gates expand outwardly, the piston is turned since the housing is stationary and the piston is mounted rotatably with respect to the housing. This rotational movement then causes lateral movement of the pistons in the housing by means of compression re gulator wheel 30.

During one half revolution, air and fuel mixture is drawn into the chambers at one end of the piston while compression occurs at the other end. During the other half revolution, these actions are reversed.

This, uniquely and simultaneously during one revolution the following occur.

two intake mixture steps two compression steps four combustion steps four powerstrokes four exhaust steps While I have described my invention with particular reference to the drawings, such is not to be considered as limiting its actual scope.

Having thus described this invention, what is asserted as new is:

1. A rotary engine, comprising:

a housing;

a cylindrical rotor, disposed in said housing, and having at least two pairs of combustion chambers disposed therein, each pair being disposed opposite the other pair in said rotor" and having a curved shape so as to open at one end atthe peripheryof said rotor and at the other end at the sides thereof;

a cylindrical shaft, mounted in said housing, for supporting said rotor therein;

a rotatable wheel, coupled to said rotor, and having one half thereof displaced and non-planar with respect to the other half thereof; and

a stationary holder, engaging said wheel, for guiding the peripheral edges of said wheel and laterally reciprocating said housing during rotation of said rotor.

2. The rotary engine as recited in claim 11, wherein said combustion chambers are disposed at each end of a diameter of said rotor.

3. The engine as recited in claim 1, wherein said shaft comprises a first inner shaft disposed in said housing, and a second outer shaft disposed over said inner shaft and coupled to said rotor and said wheel, for recriprocating said rotor on said inner shaft.

4.-The rotary engine as recited'in'claim 1, wherein each of said pairs of combustion chambers are disposed adjacent each other in said rotor. and wherein the openings thereof at the sides of said rotor comprise the intake openings of said combustion chambers, and the openings of said combustion chambers at the periphery of said rotor comprise the exhaust openings of said combustion chambers.

' I t t t i 

1. A rotary engine, comprising: a housing; a cylindrical rotor, disposed in said housing, and having at least two pairs of combustion chambers disposed therein, each pair being disposed opposite the other pair in said rotor and having a curved shape so as to open at one end at the periphery of said rotor and at the other end at the sides thereof; a cylindrical shaft, mounted in said housing, for supporting said rotor therein; a rotatable wheel, coupled to said rotor, and having one half thereof displaced and non-planar with respect to the other half thereof; and a stationary holder, engaging said wheel, for guiding the peripheral edges of said wheel and laterally reciprocating said housing during rotation of said rotor.
 2. The rotary engine as recited in claim 11, wherein said combustion chambers are disposed at each end of a diameter of said rotor.
 3. The engine as recited in claim 1, wherein said shaft comprises a first inner shaft disposed in said housing, and a second outer shaft disposed over said inner shaft and coupled to said rotor and said wheel, for recriprocating said rotor on said inner shaft.
 4. The rotary engine as recited in claim 1, wherein each of said pairs of combustion chambers are disposed adjacent each other in said rotor, and wherein the openings thereof at the sides of said rotor comprise the intake openings of said combustion chambers, and the openings of said combustion chambers at the periphery of said rotor comprise the exhaust openings of said combustion chambers. 